# SN65LBC176QDR

**Texas Instruments** · RS-485 / RS-422 ICs · SOIC-8

SN65LBC176QDR from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | R | output | Logic output carrying the RS-485 receiver data. |
| 2 | RE | input | Receiver enable/disable input. |
| 3 | DE | input | Driver enable/disable input. |
| 4 | D | input | Logic input carrying the RS-485 driver data. |
| 5 | GND | power_in | Ground reference for the device. |
| 6 | A | bidirectional | RS-485 bus pin, non-inverting. |
| 7 | B | bidirectional | RS-485 bus pin, inverted. |
| 8 | VCC | power_in | 5 V supply voltage pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Interface |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `SN65LBC176QDR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `sn65lbc176qdr-etched.step` / `sn65lbc176qdr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sn65lbc176qdr.step` / `sn65lbc176qdr.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/sn65lbc176) (29 pp, sha256 `63384c1fc84c5c91`, retrieved 2026-10-11, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/sn65lbc176qdr-datasheet.pdf)